Atty. Hilary Hellmuth Mattis

Atty. Hilary Hellmuth Mattis

Hilary Hellmuth Mattis is a lawyer practicing securities litigation & professional liability, white collar defense & investigations. Hilary received a B.A. degree from University of San Francisco in 2005, and has been licensed for 16 years.

Menlo Park Menlo Park 16 yrs experience 16 year
Call (628) 303-0199 Book Appointment

Profile Summary

About Hilary Hellmuth Mattis at a glance

Hilary Hellmuth Mattis is an Associate based in Menlo Park, California, practicing at Latham & Watkins LLP. They have 16+ years of legal experience, licensed to practice since 2010. Their practice focuses on white collar and litigation. Admitted to practice in California (2010). Educated at Santa Clara University School of Law (J.D., 2010) and University of San Francisco (B.A., 2005). Serands clients in Menlo Park, CA and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Hilary Hellmuth Mattis is a lawyer practicing securities litigation & professional liability, white collar defense & investigations
  • Hilary received a B.A. degree from University of San Francisco in 2005, and has been licensed for 16 years
  • Hilary practices at Latham & Watkins LLP in Menlo Park, CA

Practice Areas Explained

Hilary Hellmuth Mattis's Areas of Practice

Each practice area below reflects the types of cases Hilary Hellmuth Mattis handles, with a brief overview of what that area of law covers.

White Collar Crimes

Hilary Hellmuth Mattis is one of 20,025 white collar attorneys indexed nationally. Browse white collar attorneys in California →

Civil Litigation

Civil litigation attorneys for breach of contract, business disputes, civil rights, and class action lawsuits.

Hilary Hellmuth Mattis is one of 454,532 litigation attorneys indexed nationally. Browse litigation attorneys in California →

Jurisdictional Context

Why local counsel matters in California

Practicing law in California. Legal matters in California are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in Menlo Park are typically filed in the local municipal court or the appropriate California state district court, depending on subject matter and amount in controversy. An attorney licensed in California brings working knowledge of local procedural deadlines, judicial practices in this andnue, and the substantive law that applies to cases brought here. Out-of-state attorneys generally cannot represent clients in California courts without local counsel or pro hac vice admission.

Looking for additional California attorneys? Browse all attorneys in Menlo Park or all attorneys in California.

Frequently Asked

Common questions about Hilary Hellmuth Mattis

Where is Hilary Hellmuth Mattis's law office located?
Hilary Hellmuth Mattis's law practice is located in Menlo Park, California. The firm is Latham & Watkins LLP. You can contact the office directly through this profile page.
What practice areas does Hilary Hellmuth Mattis handle?
Hilary Hellmuth Mattis focuses on white collar, litigation. Each practice area listed reflects experience handling cases of that type in California.
How long has Hilary Hellmuth Mattis practiced law?
Hilary Hellmuth Mattis has 16+ years of legal experience and has been licensed since 2010.
Where did Hilary Hellmuth Mattis go to law school?
Hilary Hellmuth Mattis earned their education at (J.D., 2010); (B.A., 2005).
How can I contact Hilary Hellmuth Mattis for a consultation?
You can contact Hilary Hellmuth Mattis directly through this profile page. Click "Ask the Attorney" to submit a question, or "Schedule a Consultation" to book a meeting. Most claimed-profile attorneys respond within one business day.

Education

J.D.
Santa Clara University School of Law
- 2010
B.A.
University of San Francisco
- 2005

Bar Admissions

California
Admitted: 2010

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